The first version (42 gr) has been realised with electrical white plastic tube (IRO reference 11) : outside 18,5 mm and inside 15,8 mm (see drawing). It is appropriate perfectly for the battery. (LR06 : 14 x 50 mm)
The second version (25 gr) has been realised with tube IRO reference 9 : outside 15 and inside 12,8 mm, and the battery LR03 measure 10 x 43 mm.
The small maglite uses this battery and bulbs AAA.
Silicone is used to make waterproof of the bulb before its insertion.
The piano wire is used to surround the tube and to hold the steel pendeloque with its three-pronged fork.
Considering the difficulty of this assembly, this project failed only because a lathe operator is needed to work the various elements of this spoon.
Some reflexions :
Nevertheless, and for all those who would like to continue, I quote the problems I met during the tests and remained unsolved :
- in water the spoon turnes over, and it is necessary to modify the anchorage points of the swivel and the three-pronged fork.
- the 42 gr version is too heavy, except if it's deep enough.
- water manages to go in the tube, which tends to prove that the stoppers are not waterproof.
- the connection that consists in twisting the phone wire around the spring is not obligatory.
- more over to disconnect, to take it apart, you need 1 adjustable pliers, even 2, because the three-pronged fork and the bindings threaten your hand.
- and to finish, I heard that there is already this invention on trade and it's for less than 15. But who is the inventor ? and in which shop is it sold ?